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Finding the Fourth Proportional to 80,643,690.80, 120,965,536.28 and 80,643,690.80

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Solution

The fourth proportional to 80,643,690.80, 120,965,536.28 and 80,643,690.80 is: 120,965,536.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,643,690.80 : 120,965,536.28 = 80,643,690.80 : x
  2. Step 2: Convert to fraction form
    80,643,690.80/120,965,536.28 = 80,643,690.80/x
  3. Step 3: Cross multiply
    80,643,690.80x = 120,965,536.28 × 80,643,690.80
  4. Step 4: Simplify right side
    80,643,690.80x = 9,755,107,305,220,502
  5. Step 5: Solve for x
    x = 9,755,107,305,220,502/80,643,690.80
  6. Step 6: Final answer
    x = 120,965,536.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.